Here’s a short blog post on the topic—focused on helping users understand how to activate 7.1 surround sound for the Razer BlackShark V2 headset, since “activation codes” are often misunderstood. If you just picked up a Razer BlackShark V2 headset, you’ve probably seen mentions of a 7.1 surround sound activation code . Before you go digging through the box for a missing serial number, here’s the truth.